离子造影剂增强Micro-CT扫描对大鼠关节软骨形态的定量分析

被引:8
作者
王江雪
高玉
李辉
马家伟
樊瑜波
机构
[1] 北京航空航天大学生物与医学工程学院生物力学与力生物学教育部重点实验室
基金
中央高校基本科研业务费专项资金资助;
关键词
Micro-CT; 关节软骨; 离子造影剂; 软骨形态; 小动物模型;
D O I
10.19529/j.cnki.1672-6278.2014.03.004
中图分类号
R816.8 [外科、骨科]; R-332 [医用实验动物学];
学科分类号
100106 [放射医学]; 100402 [劳动卫生与环境卫生学];
摘要
利用Micro-CT技术的较高分辨精度,探索一种新的测量小动物关节软骨形态的方法,为进一步利用小动物模型开展关节软骨的损伤和退变等研究提供基础。选择不同浓度的造影剂及Micro-CT扫描条件,通过造影剂对比增强Micro-CT扫描大鼠膝关节,对大鼠股骨远端关节软骨进行手动分割、重建,得到软骨3D模型,利用重建得到的3D模型,对软骨的厚度和体积等形态学参数进行无创定量分析。根据造影剂、软骨和软骨下骨对X射线吸收的平均相对衰减值差异,确定30%的离子造影剂浓度为最佳。利用该浓度对4个不同的正常大鼠关节软骨进行扫描和重建,分析获得关节软骨的体积和厚度,并求得关节软骨体积和厚度的变异系数均方根分别为7.3%和6.1%。结果提示,利用造影剂增强Micro-CT扫描能够对软骨形态重要参数厚度、体积等进行定量评价。
引用
收藏
页码:157 / 161
页数:5
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